Save. Brand X Pictures/Brand X Pictures/Getty Images. A number of issues cause vertical lines on your computer screen, ranging from software incompatibilities with the computer's drivers to hardware problems involving the magnetic field of the monitor.
1) Segmented-Flow Analysis (SFA) The reaction stream is segmented with bubbles of air or nitrogen to reduce inter-sample dispersion. 2) Flow Injection Analysis (FIA) There are no air bubbles in the reaction stream.
Segmentation mixes the contents of the lumen (back-and-forth mixing of the contents of the lumen). Segmentations are localized mixing contractions in the small intestine that swirl the chyme in one section of the intestine but do not move it along the tract.